Storage cube



FIG. 1 is a perspective view of a storage cube showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being identical thereto;

FIG. 3 is a right side elevational view thereof, the left side elevational view being identical thereto; and,

FIG. 4 is a top plan view thereof, the bottom plan view being identical thereto. 

The ornamental design for a storage cube, as shown and described. 